import { bufferToFormData } from "./buffer.js";
//#region src/utils/body.ts
const MAX_NESTED_OBJECTS = 1e4;
const isRawRequest = (request) => "headers" in request;
const parseBody = async (request, options = Object.create(null)) => {
	const { all = false, dot = false } = options;
	const mediaType = (isRawRequest(request) ? request.headers : request.raw.headers).get("Content-Type")?.split(";")[0].trim().toLowerCase();
	if (mediaType === "multipart/form-data" || mediaType === "application/x-www-form-urlencoded") return parseFormData(request, {
		all,
		dot
	});
	return {};
};
/**
* Parses form data from a request.
*
* @template T - The type of the parsed body data.
* @param {HonoRequest | Request} request - The request object containing form data.
* @param {ParseBodyOptions} options - Options for parsing the form data.
* @returns {Promise<T>} The parsed body data.
*/
async function parseFormData(request, options) {
	if (!isRawRequest(request) && request.bodyCache.formData) return convertFormDataToBodyData(await request.bodyCache.formData, options);
	const headers = isRawRequest(request) ? request.headers : request.raw.headers;
	const arrayBuffer = await request.arrayBuffer();
	const formDataPromise = bufferToFormData(arrayBuffer, headers.get("Content-Type") || "");
	if (!isRawRequest(request)) request.bodyCache.formData = formDataPromise;
	const formData = await formDataPromise;
	if (formData) return convertFormDataToBodyData(formData, options);
	return {};
}
/**
* Converts form data to body data based on the provided options.
*
* @template T - The type of the parsed body data.
* @param {FormData} formData - The form data to convert.
* @param {ParseBodyOptions} options - Options for parsing the form data.
* @returns {T} The converted body data.
*/
function convertFormDataToBodyData(formData, options) {
	const form = Object.create(null);
	const nestingState = { count: 0 };
	formData.forEach((value, key) => {
		if (!(options.all || key.endsWith("[]"))) form[key] = value;
		else handleParsingAllValues(form, key, value);
	});
	if (options.dot) Object.entries(form).forEach(([key, value]) => {
		if (key.includes(".")) {
			handleParsingNestedValues(form, key, value, nestingState);
			delete form[key];
		}
	});
	return form;
}
/**
* Handles parsing all values for a given key, supporting multiple values as arrays.
*
* @param {BodyData} form - The form data object.
* @param {string} key - The key to parse.
* @param {FormDataEntryValue} value - The value to assign.
*/
const handleParsingAllValues = (form, key, value) => {
	if (form[key] !== void 0) {
		if (Array.isArray(form[key])) form[key].push(value);
		else form[key] = [form[key], value];
	} else if (!key.endsWith("[]")) form[key] = value;
	else form[key] = [value];
};
/**
* Handles parsing nested values using dot notation keys.
*
* @param {BodyData} form - The form data object.
* @param {string} key - The dot notation key.
* @param {BodyDataValue} value - The value to assign.
*/
const handleParsingNestedValues = (form, key, value, state) => {
	if (/(?:^|\.)__proto__\./.test(key)) return;
	let nestedForm = form;
	const keys = key.split(".", 34);
	if (keys.length > 33) throwNestingLimitExceeded();
	keys.forEach((key, index) => {
		if (index === keys.length - 1) nestedForm[key] = value;
		else {
			if (!nestedForm[key] || typeof nestedForm[key] !== "object" || Array.isArray(nestedForm[key]) || nestedForm[key] instanceof File) {
				if (state.count++ >= MAX_NESTED_OBJECTS) throwNestingLimitExceeded();
				nestedForm[key] = Object.create(null);
			}
			nestedForm = nestedForm[key];
		}
	});
};
const throwNestingLimitExceeded = () => {
	throw new Error("Nesting limit exceeded");
};
//#endregion
export { parseBody };